<template lang="pug">
div(class="login-container")
    el-form(ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on" label-position="left")
        div(class="title-container")
            h3(class="title") 系统登录

        el-form-item(prop="username")
            span(class="svg-container")
                i(class="el-icon-user-solid")
            el-input(ref="username" v-model="loginForm.username" placeholder="请输入用户名" name="username"
                     type="text" tabindex="1" autocomplete="on")

        el-tooltip(v-model="capsTooltip" content="Caps lock is On" placement="right" manual)
        el-form-item(prop="password")
          span(class="svg-container")
            i(class="el-icon-lock")
          el-input(:key="passwordType" ref="password" v-model="loginForm.password"
            :type="passwordType" placeholder="请输入密码" name="password" tabindex="2"
            autocomplete="on" @keyup.native="checkCapslock" @blur="capsTooltip = false"
            @keyup.enter.native="handleLogin")
          
          span(class="show-pwd" @click="showPwd")
            i(:class="passwordType === 'password' ? 'el-icon-no-smoking' : 'el-icon-view'")

        el-button(:loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin") 登录
</template>

<script>
import axios from "@/plugin/axios";
import { validUsername } from "@/lib/validate";
import util from "@/lib/util";
console.log(util);
export default {
  name: "Login",

  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error("请输入正确的用户名"));
      } else {
        callback();
      }
    };
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error("密码至少含有7个字符"));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: "admin",
        password: "111111"
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", validator: validateUsername }
        ],
        password: [
          { required: true, trigger: "blur", validator: validatePassword }
        ]
      },
      passwordType: "password",
      capsTooltip: false,
      loading: false,
      showDialog: false,
      redirect: undefined,
      otherQuery: {}
    };
  },
  watch: {
    $route: {
      handler: function(route) {
        const query = route.query;
        if (query) {
          this.redirect = query.redirect;
          this.otherQuery = this.getOtherQuery(query);
        }
      },
      immediate: true
    }
  },
  created() {
    // window.addEventListener('storage', this.afterQRScan)
  },
  mounted() {
    if (this.loginForm.username === "") {
      this.$refs.username.focus();
    } else if (this.loginForm.password === "") {
      this.$refs.password.focus();
    }
  },
  destroyed() {
    // window.removeEventListener('storage', this.afterQRScan)
  },
  methods: {
    checkCapslock({ shiftKey, key } = {}) {
      if (key && key.length === 1) {
        if (
          (shiftKey && (key >= "a" && key <= "z")) ||
          (!shiftKey && (key >= "A" && key <= "Z"))
        ) {
          this.capsTooltip = true;
        } else {
          this.capsTooltip = false;
        }
      }
      if (key === "CapsLock" && this.capsTooltip === true) {
        this.capsTooltip = false;
      }
    },
    showPwd() {
      if (this.passwordType === "password") {
        this.passwordType = "";
      } else {
        this.passwordType = "password";
      }
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },

    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (!valid) {
          console.log("error submit!!");
          return false;
        }

        this.doLogin();
      });
    },

    doLogin() {
      this.loading = true;

      const options = { url: "/login", data: this.loginForm, method: "post" };
      console.log(util)
      axios(options)
        .then(res => {
          util.store.set("token", res.token);
          util.store.set("expiresAt", res.expiresAt);

          this.$router.push({
            path: this.redirect || "/",
            query: this.otherQuery
          });
        })
        .catch(() => {})
        .then(() => (this.loading = false));
    },
    getOtherQuery(query) {
      return Object.keys(query).reduce((acc, cur) => {
        if (cur !== "redirect") {
          acc[cur] = query[cur];
        }
        return acc;
      }, {});
    }
  }
};
</script>

<style lang="less">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

@bg: #283443;
@light_gray: #fff;
@cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: @cursor)) {
  .login-container .el-input input {
    color: @cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: @light_gray;
      height: 47px;
      caret-color: @cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px @bg inset !important;
        -webkit-text-fill-color: @cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="less" scoped>
@bg: #2d3a4b;
@dark_gray: #889aa4;
@light_gray: #eee;

.login-container {
  min-height: 100vh;
  width: 100%;
  background-color: @bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 5px 5px 5px 15px;
    color: @dark_gray;
    vertical-align: middle;
    width: 8px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: @light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: @dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
